Buying the "7150" SentrySafe from Amazon was a great purchase. This was the lowest price I could find from "surfing" the net, and the shipping was free! The safe is sturdy and is easily mounted between 16" on-center wall studs, providing 14.5" of space for the 14" wide in-wall casing (note: 1/8" lathe on each side "shimed" the fit well . . . and cheap at any lumber yard). A header and footer isn't really needed, but I installed them anyway . . . just because it was easy to do. The combined combination and key provides extra security, (both are needed to open the safe), and they each operate with ease (the combination is assigned by the manufacturer). The flush face of the safe, with recessed combination, also makes it easy to hide by hanging a picture in front of it. I highly recommend this product. You can't beat the quality for price and security with ease of installation. With easy at home access, a great way to secure extra house cash, credit cards, important documents, etc. It's a bargain!!!